Rest service is not working in Windows server 2012 (IIS8)

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Windows

REST

IIS8

Hello All,

I have a REST web service which was working fine in almost all windows OS. Now I have to migrate it to a Windows server 2012 (IIS 8.0). I have faced several issues during this task.

1) First I have got the following exception

HTTP Error 500.19 - Internal Server Error

The requested page cannot be accessed because the related configuration data for the page is invalid.

Config Error : Handler "svc-Integrated" has a bad module "ManagedPipelineHandler" in its module list

2) After resolving this (using the information provided in the following link : http://mikearnett.wordpress.com/2009/02/28/http-500-handler-svc-integrated-has-a-bad-module-%E2%80%9Cmanagedpipelinehandler%E2%80%9D-in-its-module-list/[^]) , I have got another one as follows...

HTTP Error 500.19 - Internal Server Error

The requested page cannot be accessed because the related configuration data for the page is invalid.

Config Error :    Cannot add duplicate collection entry of type 'add' with unique key attribute 'name' set to 'svc-Integrated'  

Can someone help me to fix this?

Thanks in advance
Sebastian